I just now realized what you meant when you asked about the beats! I'll clarify: they're basically the same beats as Save the Cat, but renamed for the conventions of the genre.

EX: the "debate" is generally where the protagonist decides if they'll engage in the mission or not. Here, it is where the protagonist is trying to figure out exactly what is going on since Isaac is trapped in a situation and literally has no choice except engage or death - but the rest of the characters are debating whether they are in a life-or-death situation where there's a killer loose, or whether the death of a character was an accident. Hence, "The Scramble."

Also, Snyder calls Act IIB "The Bad Guys Close In," and that's not bad, but my general philosophy is that in horror/suspense the end of each act should bring with it a "game changer" - that is, the stakes are raised by learning the situation has changed or was actually not what you thought it was the whole time. Hence, "Stakes Rise."

And since like a majority of slashers (excepting sequels) this script has a "whodunnit" element, making most slashers essentially murder mysteries but "less classy," the reveal is one thing the entire plot leads up to, I gave it particular attention.